Patent Abstracts of Japan, vol. 12, No. 5 (C-467) (2852) Jan. 8, 1988 of JP-A-62-161 936 (Kawasaki Steel Corp.) Jul. 17, 1987. |
Patent Abstracts of Japan, vol. 10, No. 131 (C-346) (2188) May 15, 1986 of JP-A-60-255 953 (Sumitomo Tokushiyu Kinzoku K. K.) Dec. 17, 1985. |
Patent Abstracts of Japan, vol. 10, No. 182 (C-356) (2238) Jun. 25, 1986 of JP-A-62-030 646 (Daido Steel Co. Ltd.) Feb. 12, 1986. |
Patent Abstracts of Japan, vol. 11, No. 3 (C-395) (2450) Jan. 7, 1987 of JP-A-61-179 849 (Daido Steel Co. Ltd.) Aug. 12, 1986. |
Patent Abstracts of Japan, vol. 10, No. 203 (C-360) (2259) Jul. 16, 1986 of JP-A-61-044 156 (Nippon Mining Co. Ltd.) Mar. 3, 1986. |